EP 1167612 A2 20020102 - Method and suspension system for reducing wash tub displacement during spin cycle ramp-up
Title (en)
Method and suspension system for reducing wash tub displacement during spin cycle ramp-up
Title (de)
Verfahren und Aufhängungsvorrichtung zur Verminderung der Laugenbehälterschwankungen während der beschleunigung der Trommel während des Schleuderns
Title (fr)
Procédé et système de suspension pour réduire le déplacement de la cuve pendant l'accélération du tambour lors de l'essorage
Publication
Application
Priority
US 21368200 P 20000623
Abstract (en)
A method and a suspension structure for reducing displacement of a wash basket of a washing machine includes first providing the wash basket with a balance ring. The balancing ring is attached to the basket in the plane that is generally perpendicular to a rotation axis of the basket. The balancing has a balancing mass that is movable relative to the ring. The wash basket is supported by a tuned suspension structure to the machine. Two resonance critical frequencies for two translational degrees of freedom and that arein the plane of the balancing ring are determined. The three resonance rotational frequencies for the three rotational degrees of freedom of the suspension structure are also determined. The suspension structure is tuned so that the two critical frequencies of translation each occur at or below a critical first motor speed and so that the three rotational frequencies occur at a second speed that is above the critical rotation speed. The motor is controlled to initially ramped up the speed of the wash basket to an initial spin speed that is incrementally higher than the first critical speed and lower than the second speed. The motor speed is then dwelled for a period of time at the initial spin speed. The motor is then ramped up to a final spin speed that is above the second speed. A washing machine of the invention incorporates the tuned suspension structure or a motor that is speed controlled as described, or both.
IPC 1-7
IPC 8 full level
D06F 37/20 (2006.01); D06F 37/22 (2006.01); D06F 37/24 (2006.01)
CPC (source: EP US)
D06F 37/225 (2013.01 - EP US); D06F 37/245 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1167612 A2 20020102; EP 1167612 A3 20030226; EP 1167612 B1 20061115; BR 0102754 A 20020219; BR 0102754 B1 20100810; CN 1183283 C 20050105; CN 1331358 A 20020116; CN 1611663 A 20050504; DE 60124453 D1 20061228; DE 60124453 T2 20070503; US 2002000010 A1 20020103; US 6647575 B2 20031118
DOCDB simple family (application)
EP 01115168 A 20010622; BR 0102754 A 20010625; CN 01123325 A 20010621; CN 200410092755 A 20010621; DE 60124453 T 20010622; US 88670201 A 20010621